jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/context/java/JavaEmbeddedIdMapping.java - dali/webtools.dali - Git at Google

 /*******************************************************************************
  * Copyright (c) 2007, 2008 Oracle. All rights reserved.
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v1.0, which accompanies this distribution
  * and is available at http://www.eclipse.org/legal/epl-v10.html.
  *
  * Contributors:
  *     Oracle - initial API and implementation
  ******************************************************************************/
 package org.eclipse.jpt.core.internal.context.java;

 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Iterator;
 import java.util.List;
 import java.util.ListIterator;
 import org.eclipse.jdt.core.dom.CompilationUnit;
 import org.eclipse.jpt.core.internal.IMappingKeys;
 import org.eclipse.jpt.core.internal.context.base.IAttributeOverride;
 import org.eclipse.jpt.core.internal.context.base.IColumnMapping;
 import org.eclipse.jpt.core.internal.context.base.IEmbeddable;
 import org.eclipse.jpt.core.internal.context.base.IEmbeddedIdMapping;
 import org.eclipse.jpt.core.internal.context.base.IOverride;
 import org.eclipse.jpt.core.internal.context.base.IPersistentAttribute;
 import org.eclipse.jpt.core.internal.resource.java.AttributeOverride;
 import org.eclipse.jpt.core.internal.resource.java.AttributeOverrides;
 import org.eclipse.jpt.core.internal.resource.java.EmbeddedId;
 import org.eclipse.jpt.core.internal.resource.java.JPA;
 import org.eclipse.jpt.core.internal.resource.java.JavaPersistentAttributeResource;
 import org.eclipse.jpt.core.internal.resource.java.JavaResource;
 import org.eclipse.jpt.core.internal.resource.java.NullAttributeOverride;
 import org.eclipse.jpt.core.internal.resource.java.NullColumn;
 import org.eclipse.jpt.utility.internal.CollectionTools;
 import org.eclipse.jpt.utility.internal.Filter;
 import org.eclipse.jpt.utility.internal.iterators.ArrayIterator;
 import org.eclipse.jpt.utility.internal.iterators.CloneListIterator;
 import org.eclipse.jpt.utility.internal.iterators.CompositeListIterator;
 import org.eclipse.jpt.utility.internal.iterators.EmptyIterator;
 import org.eclipse.jpt.utility.internal.iterators.FilteringIterator;
 import org.eclipse.jpt.utility.internal.iterators.TransformationIterator;
 import org.eclipse.wst.validation.internal.provisional.core.IMessage;


 public class JavaEmbeddedIdMapping extends JavaAttributeMapping
 	implements IJavaEmbeddedIdMapping
 {
 	protected final List<IJavaAttributeOverride> specifiedAttributeOverrides;

 	protected final List<IJavaAttributeOverride> defaultAttributeOverrides;

 	private IEmbeddable embeddable;

 	public JavaEmbeddedIdMapping(IJavaPersistentAttribute parent) {
 		super(parent);
 		this.specifiedAttributeOverrides = new ArrayList<IJavaAttributeOverride>();
 		this.defaultAttributeOverrides = new ArrayList<IJavaAttributeOverride>();
 	}

 	//****************** IJavaAttributeMapping implemenation *******************

 	public String getKey() {
 		return IMappingKeys.EMBEDDED_ID_ATTRIBUTE_MAPPING_KEY;
 	}

 	public String annotationName() {
 		return EmbeddedId.ANNOTATION_NAME;
 	}

 	public Iterator<String> correspondingAnnotationNames() {
 		return new ArrayIterator<String>(
 			JPA.ATTRIBUTE_OVERRIDE,
 			JPA.ATTRIBUTE_OVERRIDES);
 	}

 	@Override
 	public boolean isIdMapping() {
 		return true;
 	}

 	//****************** IOverride.Owner implemenation *******************
 	public IColumnMapping columnMapping(String attributeName) {
 		return JavaEmbeddedMapping.columnMapping(attributeName, embeddable());
 	}

 	public boolean isVirtual(IOverride override) {
 		return this.defaultAttributeOverrides.contains(override);
 	}


 	//****************** IEmbeddedMapping implemenation *******************

 	@SuppressWarnings("unchecked")
 	public ListIterator<IJavaAttributeOverride> attributeOverrides() {
 		return new CompositeListIterator<IJavaAttributeOverride>(specifiedAttributeOverrides(), defaultAttributeOverrides());
 	}

 	public ListIterator<IJavaAttributeOverride> defaultAttributeOverrides() {
 		return new CloneListIterator<IJavaAttributeOverride>(this.defaultAttributeOverrides);
 	}

 	public ListIterator<IJavaAttributeOverride> specifiedAttributeOverrides() {
 		return new CloneListIterator<IJavaAttributeOverride>(this.specifiedAttributeOverrides);
 	}

 	public int specifiedAttributeOverridesSize() {
 		return this.specifiedAttributeOverrides.size();
 	}

 	public IJavaAttributeOverride addSpecifiedAttributeOverride(int index) {
 		IJavaAttributeOverride attributeOverride = jpaFactory().createJavaAttributeOverride(this, this);
 		this.specifiedAttributeOverrides.add(index, attributeOverride);
 		this.persistentAttributeResource.addAnnotation(index, AttributeOverride.ANNOTATION_NAME, AttributeOverrides.ANNOTATION_NAME);
 		this.fireItemAdded(IEmbeddedIdMapping.SPECIFIED_ATTRIBUTE_OVERRIDES_LIST, index, attributeOverride);
 		return attributeOverride;
 	}

 	protected void addSpecifiedAttributeOverride(int index, IJavaAttributeOverride attributeOverride) {
 		addItemToList(index, attributeOverride, this.specifiedAttributeOverrides, IEmbeddedIdMapping.SPECIFIED_ATTRIBUTE_OVERRIDES_LIST);
 	}

 	public void removeSpecifiedAttributeOverride(int index) {
 		IJavaAttributeOverride removedAttributeOverride = this.specifiedAttributeOverrides.remove(index);
 		this.persistentAttributeResource.removeAnnotation(index, AttributeOverride.ANNOTATION_NAME, AttributeOverrides.ANNOTATION_NAME);
 		fireItemRemoved(IEmbeddedIdMapping.SPECIFIED_ATTRIBUTE_OVERRIDES_LIST, index, removedAttributeOverride);
 	}

 	protected void removeSpecifiedAttributeOverride(IJavaAttributeOverride attributeOverride) {
 		removeItemFromList(attributeOverride, this.specifiedAttributeOverrides, IEmbeddedIdMapping.SPECIFIED_ATTRIBUTE_OVERRIDES_LIST);
 	}

 	public void moveSpecifiedAttributeOverride(int targetIndex, int sourceIndex) {
 		CollectionTools.move(this.specifiedAttributeOverrides, targetIndex, sourceIndex);
 		this.persistentAttributeResource.move(targetIndex, sourceIndex, AttributeOverrides.ANNOTATION_NAME);
 		fireItemMoved(IEmbeddedIdMapping.SPECIFIED_ATTRIBUTE_OVERRIDES_LIST, targetIndex, sourceIndex);
 	}

 	protected void addDefaultAttributeOverride(IJavaAttributeOverride attributeOverride) {
 		addItemToList(attributeOverride, this.defaultAttributeOverrides, IEmbeddedIdMapping.DEFAULT_ATTRIBUTE_OVERRIDES_LIST);
 	}

 	protected void removeDefaultAttributeOverride(IJavaAttributeOverride attributeOverride) {
 		removeItemFromList(attributeOverride, this.defaultAttributeOverrides, IEmbeddedIdMapping.DEFAULT_ATTRIBUTE_OVERRIDES_LIST);
 	}

 	public IJavaAttributeOverride attributeOverrideNamed(String name) {
 		return (IJavaAttributeOverride) overrideNamed(name, attributeOverrides());
 	}

 	public boolean containsAttributeOverride(String name) {
 		return containsOverride(name, attributeOverrides());
 	}

 	public boolean containsDefaultAttributeOverride(String name) {
 		return containsOverride(name, defaultAttributeOverrides());
 	}

 	public boolean containsSpecifiedAttributeOverride(String name) {
 		return containsOverride(name, specifiedAttributeOverrides());
 	}

 	private IOverride overrideNamed(String name, ListIterator<? extends IOverride> overrides) {
 		for (IOverride override : CollectionTools.iterable(overrides)) {
 			String overrideName = override.getName();
 			if (overrideName == null && name == null) {
 				return override;
 			}
 			if (overrideName != null && overrideName.equals(name)) {
 				return override;
 			}
 		}
 		return null;
 	}

 	private boolean containsOverride(String name, ListIterator<? extends IOverride> overrides) {
 		return overrideNamed(name, overrides) != null;
 	}

 	public IEmbeddable embeddable() {
 		return this.embeddable;
 	}


 	@Override
 	public void initializeFromResource(JavaPersistentAttributeResource persistentAttributeResource) {
 		super.initializeFromResource(persistentAttributeResource);
 		this.initializeAttributeOverrides(persistentAttributeResource);
 		this.initializeDefaultAttributeOverrides(persistentAttributeResource);
 		this.embeddable = embeddableFor(persistentAttribute());
 	}

 	protected void initializeAttributeOverrides(JavaPersistentAttributeResource persistentAttributeResource) {
 		ListIterator<JavaResource> annotations = persistentAttributeResource.annotations(AttributeOverride.ANNOTATION_NAME, AttributeOverrides.ANNOTATION_NAME);

 		while(annotations.hasNext()) {
 			IJavaAttributeOverride attributeOverride = jpaFactory().createJavaAttributeOverride(this, this);
 			attributeOverride.initializeFromResource((AttributeOverride) annotations.next());
 			this.specifiedAttributeOverrides.add(attributeOverride);
 		}
 	}

 	protected void initializeDefaultAttributeOverrides(JavaPersistentAttributeResource persistentAttributeResource) {
 		for (Iterator<String> i = allOverridableAttributeNames(); i.hasNext(); ) {
 			String attributeName = i.next();
 			IJavaAttributeOverride attributeOverride = attributeOverrideNamed(attributeName);
 			if (attributeOverride == null) {
 				attributeOverride = createAttributeOverride(new NullAttributeOverride(persistentAttributeResource, attributeName));
 				this.defaultAttributeOverrides.add(attributeOverride);
 			}
 		}
 	}	@Override
 	public void update(JavaPersistentAttributeResource persistentAttributeResource) {
 		super.update(persistentAttributeResource);
 		this.embeddable = embeddableFor(persistentAttribute());
 		this.updateSpecifiedAttributeOverrides(persistentAttributeResource);
 		this.updateDefaultAttributeOverrides(persistentAttributeResource);

 	}
 	protected void updateSpecifiedAttributeOverrides(JavaPersistentAttributeResource persistentAttributeResource) {
 		ListIterator<IJavaAttributeOverride> attributeOverrides = specifiedAttributeOverrides();
 		ListIterator<JavaResource> resourceAttributeOverrides = persistentAttributeResource.annotations(AttributeOverride.ANNOTATION_NAME, AttributeOverrides.ANNOTATION_NAME);

 		while (attributeOverrides.hasNext()) {
 			IJavaAttributeOverride attributeOverride = attributeOverrides.next();
 			if (resourceAttributeOverrides.hasNext()) {
 				attributeOverride.update((AttributeOverride) resourceAttributeOverrides.next());
 			}
 			else {
 				removeSpecifiedAttributeOverride(attributeOverride);
 			}
 		}

 		while (resourceAttributeOverrides.hasNext()) {
 			addSpecifiedAttributeOverride(specifiedAttributeOverridesSize(), createAttributeOverride((AttributeOverride) resourceAttributeOverrides.next()));
 		}
 	}

 	protected IJavaAttributeOverride createAttributeOverride(AttributeOverride attributeOverrideResource) {
 		IJavaAttributeOverride attributeOverride = jpaFactory().createJavaAttributeOverride(this, this);
 		attributeOverride.initializeFromResource(attributeOverrideResource);
 		return attributeOverride;
 	}

 	protected void updateDefaultAttributeOverrides(JavaPersistentAttributeResource persistentAttributeResource) {
 		for (Iterator<String> i = allOverridableAttributeNames(); i.hasNext(); ) {
 			String attributeName = i.next();
 			IJavaAttributeOverride attributeOverride = attributeOverrideNamed(attributeName);
 			if (attributeOverride == null) {
 				attributeOverride = createAttributeOverride(new NullAttributeOverride(persistentAttributeResource, attributeName));
 				addDefaultAttributeOverride(attributeOverride);
 			}
 			else if (attributeOverride.isVirtual()) {
 				attributeOverride.getColumn().update(new NullColumn(persistentAttributeResource));
 			}
 		}

 		Collection<String> attributeNames = CollectionTools.collection(allOverridableAttributeNames());

 		//remove any default mappings that are not included in the attributeNames collection
 		for (IJavaAttributeOverride attributeOverride : CollectionTools.iterable(defaultAttributeOverrides())) {
 			if (!attributeNames.contains(attributeOverride.getName())
 				|| containsSpecifiedAttributeOverride(attributeOverride.getName())) {
 				removeDefaultAttributeOverride(attributeOverride);
 			}
 		}
 	}


 	public Iterator<String> allOverridableAttributeNames() {
 		return new TransformationIterator<IPersistentAttribute, String>(this.allOverridableAttributes()) {
 			@Override
 			protected String transform(IPersistentAttribute attribute) {
 				return attribute.getName();
 			}
 		};
 	}

 	public Iterator<IPersistentAttribute> allOverridableAttributes() {
 		if (this.embeddable() == null) {
 			return EmptyIterator.instance();
 		}
 		return new FilteringIterator<IPersistentAttribute, IPersistentAttribute>(this.embeddable().persistentType().attributes()) {
 			@Override
 			protected boolean accept(IPersistentAttribute o) {
 				return o.isOverridableAttribute();
 			}
 		};
 	}

 	@Override
 	public Iterator<String> candidateValuesFor(int pos, Filter<String> filter, CompilationUnit astRoot) {
 		Iterator<String> result = super.candidateValuesFor(pos, filter, astRoot);
 		if (result != null) {
 			return result;
 		}
 		for (IAttributeOverride override : CollectionTools.iterable(this.attributeOverrides())) {
 			result = ((IJavaAttributeOverride) override).candidateValuesFor(pos, filter, astRoot);
 			if (result != null) {
 				return result;
 			}
 		}
 		return null;
 	}

 	//******** Validation ******************

 	public void addToMessages(List<IMessage> messages, CompilationUnit astRoot) {
 		super.addToMessages(messages, astRoot);
 	}

 	//******* static methods *********

 	protected static IEmbeddable embeddableFor(IJavaPersistentAttribute persistentAttribute) {
 		//TODO move this off of JavaEmbeddedMapping so that both can use it?
 		return JavaEmbeddedMapping.embeddableFor(persistentAttribute);
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2007, 2008 Oracle. All rights reserved.
	* This program and the accompanying materials are made available under the
	* terms of the Eclipse Public License v1.0, which accompanies this distribution
	* and is available at http://www.eclipse.org/legal/epl-v10.html.
	*
	* Contributors:
	* Oracle - initial API and implementation
	******************************************************************************/
	package org.eclipse.jpt.core.internal.context.java;

	import java.util.ArrayList;
	import java.util.Collection;
	import java.util.Iterator;
	import java.util.List;
	import java.util.ListIterator;
	import org.eclipse.jdt.core.dom.CompilationUnit;
	import org.eclipse.jpt.core.internal.IMappingKeys;
	import org.eclipse.jpt.core.internal.context.base.IAttributeOverride;
	import org.eclipse.jpt.core.internal.context.base.IColumnMapping;
	import org.eclipse.jpt.core.internal.context.base.IEmbeddable;
	import org.eclipse.jpt.core.internal.context.base.IEmbeddedIdMapping;
	import org.eclipse.jpt.core.internal.context.base.IOverride;
	import org.eclipse.jpt.core.internal.context.base.IPersistentAttribute;
	import org.eclipse.jpt.core.internal.resource.java.AttributeOverride;
	import org.eclipse.jpt.core.internal.resource.java.AttributeOverrides;
	import org.eclipse.jpt.core.internal.resource.java.EmbeddedId;
	import org.eclipse.jpt.core.internal.resource.java.JPA;
	import org.eclipse.jpt.core.internal.resource.java.JavaPersistentAttributeResource;
	import org.eclipse.jpt.core.internal.resource.java.JavaResource;
	import org.eclipse.jpt.core.internal.resource.java.NullAttributeOverride;
	import org.eclipse.jpt.core.internal.resource.java.NullColumn;
	import org.eclipse.jpt.utility.internal.CollectionTools;
	import org.eclipse.jpt.utility.internal.Filter;
	import org.eclipse.jpt.utility.internal.iterators.ArrayIterator;
	import org.eclipse.jpt.utility.internal.iterators.CloneListIterator;
	import org.eclipse.jpt.utility.internal.iterators.CompositeListIterator;
	import org.eclipse.jpt.utility.internal.iterators.EmptyIterator;
	import org.eclipse.jpt.utility.internal.iterators.FilteringIterator;
	import org.eclipse.jpt.utility.internal.iterators.TransformationIterator;
	import org.eclipse.wst.validation.internal.provisional.core.IMessage;


	public class JavaEmbeddedIdMapping extends JavaAttributeMapping
	implements IJavaEmbeddedIdMapping
	{
	protected final List<IJavaAttributeOverride> specifiedAttributeOverrides;

	protected final List<IJavaAttributeOverride> defaultAttributeOverrides;

	private IEmbeddable embeddable;

	public JavaEmbeddedIdMapping(IJavaPersistentAttribute parent) {
	super(parent);
	this.specifiedAttributeOverrides = new ArrayList<IJavaAttributeOverride>();
	this.defaultAttributeOverrides = new ArrayList<IJavaAttributeOverride>();
	}

	//**************** IJavaAttributeMapping implemenation *****************

	public String getKey() {
	return IMappingKeys.EMBEDDED_ID_ATTRIBUTE_MAPPING_KEY;
	}

	public String annotationName() {
	return EmbeddedId.ANNOTATION_NAME;
	}

	public Iterator<String> correspondingAnnotationNames() {
	return new ArrayIterator<String>(
	JPA.ATTRIBUTE_OVERRIDE,
	JPA.ATTRIBUTE_OVERRIDES);
	}

	@Override
	public boolean isIdMapping() {
	return true;
	}

	//**************** IOverride.Owner implemenation *****************
	public IColumnMapping columnMapping(String attributeName) {
	return JavaEmbeddedMapping.columnMapping(attributeName, embeddable());
	}

	public boolean isVirtual(IOverride override) {
	return this.defaultAttributeOverrides.contains(override);
	}


	//**************** IEmbeddedMapping implemenation *****************

	@SuppressWarnings("unchecked")
	public ListIterator<IJavaAttributeOverride> attributeOverrides() {
	return new CompositeListIterator<IJavaAttributeOverride>(specifiedAttributeOverrides(), defaultAttributeOverrides());
	}

	public ListIterator<IJavaAttributeOverride> defaultAttributeOverrides() {
	return new CloneListIterator<IJavaAttributeOverride>(this.defaultAttributeOverrides);
	}

	public ListIterator<IJavaAttributeOverride> specifiedAttributeOverrides() {
	return new CloneListIterator<IJavaAttributeOverride>(this.specifiedAttributeOverrides);
	}

	public int specifiedAttributeOverridesSize() {
	return this.specifiedAttributeOverrides.size();
	}

	public IJavaAttributeOverride addSpecifiedAttributeOverride(int index) {
	IJavaAttributeOverride attributeOverride = jpaFactory().createJavaAttributeOverride(this, this);
	this.specifiedAttributeOverrides.add(index, attributeOverride);
	this.persistentAttributeResource.addAnnotation(index, AttributeOverride.ANNOTATION_NAME, AttributeOverrides.ANNOTATION_NAME);
	this.fireItemAdded(IEmbeddedIdMapping.SPECIFIED_ATTRIBUTE_OVERRIDES_LIST, index, attributeOverride);
	return attributeOverride;
	}

	protected void addSpecifiedAttributeOverride(int index, IJavaAttributeOverride attributeOverride) {
	addItemToList(index, attributeOverride, this.specifiedAttributeOverrides, IEmbeddedIdMapping.SPECIFIED_ATTRIBUTE_OVERRIDES_LIST);
	}

	public void removeSpecifiedAttributeOverride(int index) {
	IJavaAttributeOverride removedAttributeOverride = this.specifiedAttributeOverrides.remove(index);
	this.persistentAttributeResource.removeAnnotation(index, AttributeOverride.ANNOTATION_NAME, AttributeOverrides.ANNOTATION_NAME);
	fireItemRemoved(IEmbeddedIdMapping.SPECIFIED_ATTRIBUTE_OVERRIDES_LIST, index, removedAttributeOverride);
	}

	protected void removeSpecifiedAttributeOverride(IJavaAttributeOverride attributeOverride) {
	removeItemFromList(attributeOverride, this.specifiedAttributeOverrides, IEmbeddedIdMapping.SPECIFIED_ATTRIBUTE_OVERRIDES_LIST);
	}

	public void moveSpecifiedAttributeOverride(int targetIndex, int sourceIndex) {
	CollectionTools.move(this.specifiedAttributeOverrides, targetIndex, sourceIndex);
	this.persistentAttributeResource.move(targetIndex, sourceIndex, AttributeOverrides.ANNOTATION_NAME);
	fireItemMoved(IEmbeddedIdMapping.SPECIFIED_ATTRIBUTE_OVERRIDES_LIST, targetIndex, sourceIndex);
	}

	protected void addDefaultAttributeOverride(IJavaAttributeOverride attributeOverride) {
	addItemToList(attributeOverride, this.defaultAttributeOverrides, IEmbeddedIdMapping.DEFAULT_ATTRIBUTE_OVERRIDES_LIST);
	}

	protected void removeDefaultAttributeOverride(IJavaAttributeOverride attributeOverride) {
	removeItemFromList(attributeOverride, this.defaultAttributeOverrides, IEmbeddedIdMapping.DEFAULT_ATTRIBUTE_OVERRIDES_LIST);
	}

	public IJavaAttributeOverride attributeOverrideNamed(String name) {
	return (IJavaAttributeOverride) overrideNamed(name, attributeOverrides());
	}

	public boolean containsAttributeOverride(String name) {
	return containsOverride(name, attributeOverrides());
	}

	public boolean containsDefaultAttributeOverride(String name) {
	return containsOverride(name, defaultAttributeOverrides());
	}

	public boolean containsSpecifiedAttributeOverride(String name) {
	return containsOverride(name, specifiedAttributeOverrides());
	}

	private IOverride overrideNamed(String name, ListIterator<? extends IOverride> overrides) {
	for (IOverride override : CollectionTools.iterable(overrides)) {
	String overrideName = override.getName();
	if (overrideName == null && name == null) {
	return override;
	}
	if (overrideName != null && overrideName.equals(name)) {
	return override;
	}
	}
	return null;
	}

	private boolean containsOverride(String name, ListIterator<? extends IOverride> overrides) {
	return overrideNamed(name, overrides) != null;
	}

	public IEmbeddable embeddable() {
	return this.embeddable;
	}



	@Override
	public void initializeFromResource(JavaPersistentAttributeResource persistentAttributeResource) {
	super.initializeFromResource(persistentAttributeResource);
	this.initializeAttributeOverrides(persistentAttributeResource);
	this.initializeDefaultAttributeOverrides(persistentAttributeResource);
	this.embeddable = embeddableFor(persistentAttribute());
	}

	protected void initializeAttributeOverrides(JavaPersistentAttributeResource persistentAttributeResource) {
	ListIterator<JavaResource> annotations = persistentAttributeResource.annotations(AttributeOverride.ANNOTATION_NAME, AttributeOverrides.ANNOTATION_NAME);

	while(annotations.hasNext()) {
	IJavaAttributeOverride attributeOverride = jpaFactory().createJavaAttributeOverride(this, this);
	attributeOverride.initializeFromResource((AttributeOverride) annotations.next());
	this.specifiedAttributeOverrides.add(attributeOverride);
	}
	}

	protected void initializeDefaultAttributeOverrides(JavaPersistentAttributeResource persistentAttributeResource) {
	for (Iterator<String> i = allOverridableAttributeNames(); i.hasNext(); ) {
	String attributeName = i.next();
	IJavaAttributeOverride attributeOverride = attributeOverrideNamed(attributeName);
	if (attributeOverride == null) {
	attributeOverride = createAttributeOverride(new NullAttributeOverride(persistentAttributeResource, attributeName));
	this.defaultAttributeOverrides.add(attributeOverride);
	}
	}
	} @Override
	public void update(JavaPersistentAttributeResource persistentAttributeResource) {
	super.update(persistentAttributeResource);
	this.embeddable = embeddableFor(persistentAttribute());
	this.updateSpecifiedAttributeOverrides(persistentAttributeResource);
	this.updateDefaultAttributeOverrides(persistentAttributeResource);

	}
	protected void updateSpecifiedAttributeOverrides(JavaPersistentAttributeResource persistentAttributeResource) {
	ListIterator<IJavaAttributeOverride> attributeOverrides = specifiedAttributeOverrides();
	ListIterator<JavaResource> resourceAttributeOverrides = persistentAttributeResource.annotations(AttributeOverride.ANNOTATION_NAME, AttributeOverrides.ANNOTATION_NAME);

	while (attributeOverrides.hasNext()) {
	IJavaAttributeOverride attributeOverride = attributeOverrides.next();
	if (resourceAttributeOverrides.hasNext()) {
	attributeOverride.update((AttributeOverride) resourceAttributeOverrides.next());
	}
	else {
	removeSpecifiedAttributeOverride(attributeOverride);
	}
	}

	while (resourceAttributeOverrides.hasNext()) {
	addSpecifiedAttributeOverride(specifiedAttributeOverridesSize(), createAttributeOverride((AttributeOverride) resourceAttributeOverrides.next()));
	}
	}

	protected IJavaAttributeOverride createAttributeOverride(AttributeOverride attributeOverrideResource) {
	IJavaAttributeOverride attributeOverride = jpaFactory().createJavaAttributeOverride(this, this);
	attributeOverride.initializeFromResource(attributeOverrideResource);
	return attributeOverride;
	}

	protected void updateDefaultAttributeOverrides(JavaPersistentAttributeResource persistentAttributeResource) {
	for (Iterator<String> i = allOverridableAttributeNames(); i.hasNext(); ) {
	String attributeName = i.next();
	IJavaAttributeOverride attributeOverride = attributeOverrideNamed(attributeName);
	if (attributeOverride == null) {
	attributeOverride = createAttributeOverride(new NullAttributeOverride(persistentAttributeResource, attributeName));
	addDefaultAttributeOverride(attributeOverride);
	}
	else if (attributeOverride.isVirtual()) {
	attributeOverride.getColumn().update(new NullColumn(persistentAttributeResource));
	}
	}

	Collection<String> attributeNames = CollectionTools.collection(allOverridableAttributeNames());

	//remove any default mappings that are not included in the attributeNames collection
	for (IJavaAttributeOverride attributeOverride : CollectionTools.iterable(defaultAttributeOverrides())) {
	if (!attributeNames.contains(attributeOverride.getName())
	\|\| containsSpecifiedAttributeOverride(attributeOverride.getName())) {
	removeDefaultAttributeOverride(attributeOverride);
	}
	}
	}


	public Iterator<String> allOverridableAttributeNames() {
	return new TransformationIterator<IPersistentAttribute, String>(this.allOverridableAttributes()) {
	@Override
	protected String transform(IPersistentAttribute attribute) {
	return attribute.getName();
	}
	};
	}

	public Iterator<IPersistentAttribute> allOverridableAttributes() {
	if (this.embeddable() == null) {
	return EmptyIterator.instance();
	}
	return new FilteringIterator<IPersistentAttribute, IPersistentAttribute>(this.embeddable().persistentType().attributes()) {
	@Override
	protected boolean accept(IPersistentAttribute o) {
	return o.isOverridableAttribute();
	}
	};
	}

	@Override
	public Iterator<String> candidateValuesFor(int pos, Filter<String> filter, CompilationUnit astRoot) {
	Iterator<String> result = super.candidateValuesFor(pos, filter, astRoot);
	if (result != null) {
	return result;
	}
	for (IAttributeOverride override : CollectionTools.iterable(this.attributeOverrides())) {
	result = ((IJavaAttributeOverride) override).candidateValuesFor(pos, filter, astRoot);
	if (result != null) {
	return result;
	}
	}
	return null;
	}

	//****** Validation ****************

	public void addToMessages(List<IMessage> messages, CompilationUnit astRoot) {
	super.addToMessages(messages, astRoot);
	}

	//***** static methods *******

	protected static IEmbeddable embeddableFor(IJavaPersistentAttribute persistentAttribute) {
	//TODO move this off of JavaEmbeddedMapping so that both can use it?
	return JavaEmbeddedMapping.embeddableFor(persistentAttribute);
	}

	}